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QR Challenge: Missing Numbers!

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.


B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!


C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.


Questions / Answers (teacher reference)

Question

Answer

1. 2 + 7 = _ + 54
2. 10 - 5 = 3 + _2
3. 13 - 5 = 18 - _10
4. 19 + _ = 10 + 101
5. 16 - 6 = 20 - _10
6. 8 + _ = 4 + 40
7. 16 - _ = 10 - 28
8. 3 + _ = 10 - _4
9. 13 - 7 = _ + 33
10. 0 + 18 = 9 + _9
11. 7 + _ = 20 - _13
12. 18 - _ = 12 + 60
13. 13 - _ = 58
14. 20 - _ = 812
15. 13 + _ = 207
16. _ + 11 = 165
17. _ + 8 = 1911
18. _ + 3 = 1512
19. 2 + _ = 1614
20. _ + 5 = 2015

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q1/20:

2 + 7 = _ + 5&choe=UTF-8

Question 1 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q2/20:

10 - 5 = 3 + _&choe=UTF-8

Question 2 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q3/20:

13 - 5 = 18 - _&choe=UTF-8

Question 3 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q4/20:

19 + _ = 10 + 10&choe=UTF-8

Question 4 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q5/20:

16 - 6 = 20 - _&choe=UTF-8

Question 5 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q6/20:

8 + _ = 4 + 4&choe=UTF-8

Question 6 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q7/20:

16 - _ = 10 - 2&choe=UTF-8

Question 7 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q8/20:

3 + _ = 10 - _&choe=UTF-8

Question 8 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q9/20:

13 - 7 = _ + 3&choe=UTF-8

Question 9 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q10/20:

0 + 18 = 9 + _&choe=UTF-8

Question 10 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q11/20:

7 + _ = 20 - _&choe=UTF-8

Question 11 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q12/20:

18 - _ = 12 + 6&choe=UTF-8

Question 12 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q13/20:

13 - _ = 5&choe=UTF-8

Question 13 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q14/20:

20 - _ = 8&choe=UTF-8

Question 14 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q15/20:

13 + _ = 20&choe=UTF-8

Question 15 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q16/20:

_ + 11 = 16&choe=UTF-8

Question 16 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q17/20:

_ + 8 = 19&choe=UTF-8

Question 17 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q18/20:

_ + 3 = 15&choe=UTF-8

Question 18 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q19/20:

2 + _ = 16&choe=UTF-8

Question 19 (of 20)

 



Missing Numbers!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Missing Numbers!
Q20/20:

_ + 5 = 20&choe=UTF-8

Question 20 (of 20)